1 mean in python - PrivacyWall

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What does [:-1] mean/do in python? - Stack Overflow

Working on a python assignment and was curious as to what [:-1] means in the context of the following code: instructions = f.readline()[:-1] Have searched on here on S.O. and on Google but to no avail. Would love an explanation!

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syntax - What does :-1 mean in python? - Stack Overflow

I'm trying to port some Python code to C, but I came across this line and I can't figure out what it means: if message.startswith('<stream:stream'): message = message[:-1] + ' />' I understand that if ' message starts with <stream:stream then something needs to be appended.

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Python Slicing – How to Slice an Array and What Does [::-1] Mean?

Here, we specify a start of index 2, no end, and a step of -1. Slicing here will start from index 2 which is 3. The negative steps mean the next value in the slice will be at an index smaller than the previous index by 1. This means 2 - 1 which is 1 so the value at this index, which is 2 will be added to the slice.

https://www.geeksforgeeks.org/python-statistics-mean-function/

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statistics mean() function – Python | GeeksforGeeks

The mean() function from Python’s statistics module is used to calculate the average of a set of numeric values. It adds up all the values in a list and divides the total by the number of elements. For example, if we have a list [2, 4, 6, 8], the mean would be (2 + 4 + 6 + 8) / 4 = 5.0.This function is useful when analyzing data and finding central tendencies.

https://numpy.org/doc/stable/reference/generated/numpy.mean.html

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numpy.mean — NumPy v2.2 Manual

Axis or axes along which the means are computed. The default is to compute the mean of the flattened array. If this is a tuple of ints, a mean is performed over multiple axes, instead of a single axis or all the axes as before. dtype data-type, optional. Type to use in computing the mean.

https://www.guru99.com/1-in-python.html

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1] in Python with Examples - Guru99

How to reverse a Python list using 1 in Python? The negative slicing and negative indexing can be applied to reverse a string or list in python. Let us take a string named “GURU99” to illustrate an example. Example. Python Code: b= "GURU99" print ("The list is", b) Substring=b[::-1] print (" The reverse of string GURU99 is", Substring) Output:

https://stackoverflow.com/questions/28535392/what-does-n-1-means-...

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string - What does n [::-1] means in Python? - Stack Overflow

This is explained nicely in Understanding slice notation, in the Python docs under "extended slicing", and in this blogpost: Python Slice Examples: Start, Stop and Step. Share. Improve this answer. Follow edited May 1, 2020 at 22:47. Trenton McKinney ... -1] mean in python - slicing? 34.

https://stackoverflow.com/questions/27652686/python-what-does-for...

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Python: What does for x in A [1:] mean? - Stack Overflow

When you use the : that can mean take everything or everything from a certain index. So A[1:] is the slice notation that says, "Take elements 1 to the end" of the list. So in my simple example A[1:] gives you a slice of the list that is [4,5,6] The second have of the question is about the for x... part. In this case this is the Python notation ...

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What is the meaning of "int(a[::-1])" in Python? - Stack Overflow

Now the indexing here and also the step count, support negative numbers. So, if you give a -1 index, it translates to len(a)-1 index. And if you give -x as the step count, then it would step every x'th value from the start index, till the stop index in the reverse direction. For example. a = '1234' print a[3:0:-1] This would return . 432

https://www.tutorialspoint.com/what-does-do-in-python

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What Does 'do' Do in Python - Online Tutorials Library

Slicing in Python gets a sub-string from a string. The slicing range is set as parameters i.e. start, stop and step. For slicing, the 1st index is 0.

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